I was sent this riddle to solve via Blackberry Messenger earlier today and thought I'd share it with you. Give it a go. I'll put the answer up in 24 hours.
A young lady, while at the funeral of her mother, meets a guy who she has never met before in her life. She falls in love with him but he never proposes and she never finds him again. A few days later she kills her sister.
Q: What was her motive for killing her sister?